The frequency depends on C, which must have the indicated value ratio, and also on R, which can be between 10k and 100k. The power supply must be dual, typically between 5 and 12 V.

The frequency depends on C, which must have the indicated value ratio, and also on R, which can be between 10k and 100k. The power supply must be dual, typically between 5 and 12 V.